knockout A knockout (abbreviated to KO or K.O.) is a fight-ending, winning criterion in several full-contact combat sports, such as boxing, kickboxing, muay thai, mixed martial arts, karate, some forms of taekwondo and other sports involving striking, a ...

, in several sports, is a strike that renders an opponent unable to continue fighting. Knockout may also refer to:

Sports and games

* ''Knock Out'' (Gottlieb pinball), a 1950 pinball machine * Knock Out (kickboxing), a Japanese kickboxing promotion * ''Knock Out'' (tabletop game), a tabletop game by the Milton Bradley Company *

Knockout (game) Variations of basketball are games or activities based on, or similar in origin to, the game of basketball, in which the player utilizes common basketball skills. Some are essentially identical to basketball, with only minor rules changes, while ...

, a basketball-related activity * Knockout Cup (speedway), a British motorcycle speedway competition * Knockout system, a tournament format divided into successive rounds * Knockout tournament, a single-elimination tournament * New England Knockouts, an American professional baseball team in Massachusetts *

Technical knockout A knockout (abbreviated to KO or K.O.) is a fight-ending, winning criterion in several full-contact combat sports, such as boxing, kickboxing, muay thai, mixed martial arts, karate, some forms of taekwondo and other sports involving striking, a ...

(TKO), a knockout called by an official for safety reasons * " TNA Knockout", a term used by Total Nonstop Action Wrestling to refer to its female talent

Comics

* ''Knockout'' (UK comics), either of two British comic books *

Knockout (DC Comics) Knockout is a fictional character, a supervillainess in the DC Comics universe. She first appeared in ''Superboy'' (vol. 4) #1 (February 1994), and was created by Karl Kesel and Tom Grummett. A former Female Fury warrior from the hellish planet ...

, a comic book character * Knock Out (''Transformers: Prime''), a fictional robot supervillain turned superhero * Knockout, a '' Femme Fatales'' comics character

Literature

* ''Knock-Out'' (novel), a Bulldog Drummond novel * ''Knockout: Interviews with Doctors Who Are Curing Cancer – And How to Prevent Getting It in the First Place'', a book by

Suzanne Somers Suzanne Marie Somers (née Mahoney; born October 16, 1946) is an American actress, author, singer, businesswoman, and health spokesperson. She appeared in the television role of Chrissy Snow on ''Three's Company'' and as Carol Foster Lambert on ...

Music

Knockout Entertainment Knockout Entertainment is singer Ray J's vanity label, founded in 2001. The label specializes in R&B, hip hop, and gospel. Originally released under Sanctuary Records, a press release in December 2007 announced a new partnership with E1 Records. ...

, an American record label * ''Knock Out'' (Bonfire album) (1991), album by the hard rock band Bonfire * "Knockout" (Triple 8 song) (2003), a song by the British pop/rock group Triple 8 ** "

Twins (Knock Out) "Knockout" is the debut single recorded by the British pop/rock group Triple 8, released on 21 April 2003 in the United Kingdom. The single reached a peak position of number 8 on the UK Singles Chart. Track listing ;CD 1 #"Knockout" 3:22 #"Take ...

", a cover version by Super Junior * "Knockout" (Lil Wayne song) (2010), song by Lil Wayne from his album ''Rebirth'' * "K.O." (Pabllo Vittar song) (2017), song by Pabllo Vittar from her album ''Vai Passar Mal'' * ''TKO'' (The Knock Out), 2018 album by Mya * ''Knock Out!'', a 1981 album by

Toots and the Maytals The Maytals, known from 1972 to 2020 as Toots and the Maytals, are a Jamaican musical group, one of the best known ska and rocksteady vocal groups. The Maytals were formed in the early 1960s and were key figures in popularizing reggae music. ...

* "Knockout" (Bon Jovi song), song from 2016 album ''This House Is Not for Sale'' * "Knock Out" (GD & TOP song), 2011 song by GD & TOP for their self-entitled album * "Knockout" (2019), a song by Martin Tungevaag

Film and television

* ''

The Knockout ''The Knockout'' is a 1914 American silent comedy film starring Roscoe "Fatty" Arbuckle. It also features Charlie Chaplin in a small role, his seventeenth film for Keystone Studios. It is one of only a few films in which Chaplin's Little ...

'', a 1914 Keystone Studios film with Fatty Arbuckle and Charlie Chaplin. * ''The Knockout'' (1923 film), a 1923 British silent sports film directed by Alexander Butler * ''The Knockout'' (1925 film), a silent drama directed by Lambert Hillyer * ''Knockout'' (1935 film), a German sports film * ''Knockout'' (1941 film), a 1941 American drama directed by William Clemens * ''Knock Out'' (1943 film), a 1943 Italian crime film directed by Carmine Gallone * ''Knockout'' (2000 film), an American film about a female boxer * ''Knock Out'' (2010 film), an Indian Hindi-language action-thriller film * ''Knockout'' (2011 film) or ''Born to Fight'', a Canadian film * ''Haywire'' (2011 film) or ''Knockout'', a 2011 American film * ''Knockout'' (game show), a 1977–78 NBC series hosted by Arte Johnson * ''Knockout'' (Indonesian TV series), a game show * ''The Knockout'' (Chinese TV series), a 2023 Chinese TV series directed by Xu Jizhou

Information technology

* Knockout (web framework), a JavaScript library * Image knockout, removing the background from an image

Material removal

Knock-outs An electrical enclosure is a cabinet for electrical or electronic equipment to mount switches, knobs and displays and to prevent electrical shock to equipment users and protect the contents from the environment. The enclosure is the only part ...

, partially punched enclosure openings for optional removal *

Knockout punch In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw. There are thr ...

, a metalworking tool * Knock-out pot, a vapor–liquid separator

Other uses

* Knockouts (salon), an American salon chain *

Knockout CP Freshmart Thammanoon Niyomtrong ( th, ธรรมนูญ นิยมตรง, born 20 September 1990), known by his ring name Knockout CP Freshmart, is a Thai professional boxer and former Muay Thai fighter who has held the WBA (Super) mini-flyweig ...

(born 1990), Thai boxer and former Muay Thai fighter * Knock-out option, a barrier option in financial markets *

Knockout game "Knockout game" is one of the names given in the United States for assaults in which a person (with others acting as accomplices or lookouts) attempts to make an unsuspecting victim lose consciousness with a single sucker punch. The assaults hav ...

, a criminally violent activity *

Gene knockout A gene knockout (abbreviation: KO) is a genetic technique in which one of an organism's genes is made inoperative ("knocked out" of the organism). However, KO can also refer to the gene that is knocked out or the organism that carries the gene kno ...

, molecular biology technique * Operation Knockout, a military campaign * Reversing type, also known as knocking out, a method of typographic printing